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Microstructure and High Damping Properties of Mg-Zn-Y Alloys Containing LPSO Phase and I Phase
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Microstructure and High Damping Properties of Mg-Zn-Y Alloys Containing LPSO Phase and I Phase
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National Natural Science Foundation of China (51361010); Natural Science Foundation of Jiangxi Province (196 20114BAB216015); the Foundation of Jiangxi Educational Committee (GJJ12320); the State Key Laboratory of Solidification Processing in NWPU (SKLSP201321)

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    摘要:

    研究了含有LPSO相和I相的高阻尼Mg-Zn-Y合金。通過光學(xué)顯微鏡(OP)和SEM電鏡觀察了高阻尼Mg80Y4Zn16 (at%)合金的顯微組織。此外，差熱分析(DTA)用來分析其相變。對不同固溶時間 (3, 6, 9 h) 的組織演變和阻尼特性進行了詳細研究。結(jié)果表明， Mg80Y4Zn16合金相的主要成分是α-Mg, Mg12ZnY, Mg3Zn6Y及 Mg10ZnY2相，首次報道了該合金中I相和LPSO相共存。該合金的平均阻尼值是0.03，這表明其為高阻尼合金; 阻尼是應(yīng)變振幅依賴型。對合金的高阻尼機制也進行了詳細地討論。

    Abstract:

    A high damping Mg-Zn-Y alloy containing LPSO phase and I phase was investigated. The microstructure of a high damping Mg80Y4Zn16 (at%) alloy was examined by optical microscopy (OM) and SEM. Furthermore, the differential thermal analysis (DTA) was used to analyze its phase transformation. Microstructure evolution and damping properties under the conditions of the different solid solution time (3, 6, 9 h) were studied. The results show that the main phase component of the Mg80Y4Zn16 alloy is α-Mg, Mg12ZnY (X phase), Mg3Zn6Y (I phase) and Mg10ZnY2 phase (LPSO phase), in which I phase and LPSO phase coexistence is firstly reported. The average damping value of the alloy is 0.03, indicating that it is a high damping alloy. The damping is strain amplitude dependent. The high damping mechanism was also discussed.

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萬迪慶,李俊杰,于 田. Microstructure and High Damping Properties of Mg-Zn-Y Alloys Containing LPSO Phase and I Phase[J].稀有金屬材料與工程,2015,44(11):2651~2655.[Wan Diqing, Li junjie, Yu Tian. Microstructure and High Damping Properties of Mg-Zn-Y Alloys Containing LPSO Phase and I Phase[J]. Rare Metal Materials and Engineering,2015,44(11):2651~2655.]
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  • 收稿日期:2014-11-15
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  • 在線發(fā)布日期: 2016-07-29
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